Prof. G Marinesco and I. Minea. About microscopic sympathetic hypospinal nodes. — Neurologisches Centralblatt. 1908 No. 4

By chance, during the study of the spinal ganglia, the authors discovered in the neighborhood of the subganglionic part of the spinal nerves, (near the corresponding spinal ganglia), small sympathetic ganglia, inaccessible to the naked eye and visible only in microscopic sections. Some technical precautions are necessary to find these knots. Usually these nodules are located outward and downward from the corresponding spinal ganglia and never above them or in the intraarachnoid part of the spinal roots.